BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
Racewerkz Engineering
Post Reply
 
Thread Tools Search this Thread
      04-17-2009, 12:59 PM   #1
d_dot
4 * General
 
d_dot's Avatar
 
Drives: F12 M6,Audi R8 Lambo Gallardo
Join Date: Dec 2007
Location: Tri-State

Posts: 645
iTrader: (0)

Send a message via AIM to d_dot
Which Exhaust Setup Gives You The Most Gains?

I dont care about the money. and im not worried about emissions. i also dont really want the check engine light coming on either. I wanna go catless and want a system from the end of the headers all the way back. which setup will give me the most hp / tq gains???? thx in adv
__________________
Nissan GT-R (Sold) E92 M3 + 335 (sold) F10 535 (sold) When Driving Nice Whips It Helps To Have Nice Kix!
d_dot is offline   United_States
0
Reply With Quote
      04-17-2009, 01:42 PM   #2
camaross305
 
camaross305's Avatar
 
Drives: 2008 M3
Join Date: Jul 2008
Location: gainesville fl

Posts: 1,825
iTrader: (20)

I would say AA catless x pipe, their software, and their exhaust. They are one of the few that have dynos for their exhaust alone. I want to say it was about a 14hp increase for just the catback. Regardless of what brand x pipe/mid pipe setup you get if you delete the primary cats your going to have to get the car tuned in order to avoid not having a check engine light.
camaross305 is offline  
0
Reply With Quote
      04-17-2009, 01:47 PM   #3
dogears
My master volume goes to 11
 
dogears's Avatar
 
Drives: 2009 Space Gray M3 Sedan M-DCT
Join Date: Dec 2008
Location: Cherry Hill, NJ

Posts: 424
iTrader: (0)

Excellent choice, AA. Pricey but good.

Fabspeeds dynos are just as good btw. 15hp for their Xpipe. Priced at $625 as well.

Quote:
Originally Posted by camaross305 View Post
I would say AA catless x pipe, their software, and their exhaust. They are one of the few that have dynos for their exhaust alone. I want to say it was about a 14hp increase for just the catback. Regardless of what brand x pipe/mid pipe setup you get if you delete the primary cats your going to have to get the car tuned in order to avoid not having a check engine light.
__________________
2009 Space Gray Carbon Leather E90 with DCT, Tech package, and EPS. Mods: Fabspeed 200 cell cats, Xpipe w/resonators and no secondary cats, BPM tune, Euro DCT software, Eisenmann Sport Mufflers, Vorsteiner Rear Diffuser II, SWS8 subs, JL Audio XD400 bridged 2X200W, built in radar
dogears is offline  
0
Reply With Quote
      04-17-2009, 02:05 PM   #4
dmerk1978
First Lieutenant
 
dmerk1978's Avatar
 
Drives: e 90 m3 sedan aw
Join Date: Dec 2008
Location: long beach, ca

Posts: 315
iTrader: (0)

Garage List
2009 red bad ass wagon  [0.00]
2008 E90  [0.00]
2007 Denali  [0.00]
2006 550i  [0.00]
2004 clk 500  [0.00]
rpi gt exhaust 28hp legit
dmerk1978 is offline  
0
Reply With Quote
      04-17-2009, 02:16 PM   #5
d_dot
4 * General
 
d_dot's Avatar
 
Drives: F12 M6,Audi R8 Lambo Gallardo
Join Date: Dec 2007
Location: Tri-State

Posts: 645
iTrader: (0)

Send a message via AIM to d_dot
Quote:
Originally Posted by dmerk1978 View Post
rpi gt exhaust 28hp legit
with out cats or with cats?
__________________
Nissan GT-R (Sold) E92 M3 + 335 (sold) F10 535 (sold) When Driving Nice Whips It Helps To Have Nice Kix!
d_dot is offline   United_States
0
Reply With Quote
      04-17-2009, 02:19 PM   #6
Checkcaptain
Captain
 
Drives: BMW M3 E92
Join Date: Jan 2009
Location: Germany

Posts: 995
iTrader: (0)

Send a message via MSN to Checkcaptain Send a message via Skype™ to Checkcaptain
Quote:
Originally Posted by camaross305 View Post
I would say AA catless x pipe, their software, and their exhaust. They are one of the few that have dynos for their exhaust alone. I want to say it was about a 14hp increase for just the catback. Regardless of what brand x pipe/mid pipe setup you get if you delete the primary cats your going to have to get the car tuned in order to avoid not having a check engine light.

Akrapovic TI evolution system!
Attached Images
 
Checkcaptain is offline   Germany
0
Reply With Quote
      04-17-2009, 02:20 PM   #7
d_dot
4 * General
 
d_dot's Avatar
 
Drives: F12 M6,Audi R8 Lambo Gallardo
Join Date: Dec 2007
Location: Tri-State

Posts: 645
iTrader: (0)

Send a message via AIM to d_dot
whats the hp gains on the Akrapovic TI evolution system?
__________________
Nissan GT-R (Sold) E92 M3 + 335 (sold) F10 535 (sold) When Driving Nice Whips It Helps To Have Nice Kix!
d_dot is offline   United_States
0
Reply With Quote
      04-17-2009, 02:44 PM   #8
Checkcaptain
Captain
 
Drives: BMW M3 E92
Join Date: Jan 2009
Location: Germany

Posts: 995
iTrader: (0)

Send a message via MSN to Checkcaptain Send a message via Skype™ to Checkcaptain
Quote:
Originally Posted by d_dot View Post
whats the hp gains on the Akrapovic TI evolution system?
Here it comes:
Attached Images
File Type: pdf Akrapovic M39X.pdf (375.8 KB, 117 views)
Checkcaptain is offline   Germany
0
Reply With Quote
      04-17-2009, 02:49 PM   #9
dogears
My master volume goes to 11
 
dogears's Avatar
 
Drives: 2009 Space Gray M3 Sedan M-DCT
Join Date: Dec 2008
Location: Cherry Hill, NJ

Posts: 424
iTrader: (0)

That is beautiful!

But it requires a tune to prevent CEL.....

Quote:
Originally Posted by Checkcaptain View Post
Here it comes:
__________________
2009 Space Gray Carbon Leather E90 with DCT, Tech package, and EPS. Mods: Fabspeed 200 cell cats, Xpipe w/resonators and no secondary cats, BPM tune, Euro DCT software, Eisenmann Sport Mufflers, Vorsteiner Rear Diffuser II, SWS8 subs, JL Audio XD400 bridged 2X200W, built in radar
dogears is offline  
0
Reply With Quote
      04-17-2009, 02:58 PM   #10
Checkcaptain
Captain
 
Drives: BMW M3 E92
Join Date: Jan 2009
Location: Germany

Posts: 995
iTrader: (0)

Send a message via MSN to Checkcaptain Send a message via Skype™ to Checkcaptain
Negative - it comes with Lambda adaptors!

Quote:
Originally Posted by dogears View Post
That is beautiful!

But it requires a tune to prevent CEL.....
Checkcaptain is offline   Germany
0
Reply With Quote
      04-17-2009, 03:10 PM   #11
dmerk1978
First Lieutenant
 
dmerk1978's Avatar
 
Drives: e 90 m3 sedan aw
Join Date: Dec 2008
Location: long beach, ca

Posts: 315
iTrader: (0)

Garage List
2009 red bad ass wagon  [0.00]
2008 E90  [0.00]
2007 Denali  [0.00]
2006 550i  [0.00]
2004 clk 500  [0.00]
Quote:
Originally Posted by d_dot View Post
with out cats or with cats?
cat delete

http://www.m3post.com/forums/showthr...=236430&page=9
dmerk1978 is offline  
0
Reply With Quote
      04-17-2009, 03:29 PM   #12
naveenb
Private First Class
 
naveenb's Avatar
 
Drives: nothing yet...
Join Date: Jan 2009
Location: cali...ftw!

Posts: 114
iTrader: (0)

if money is no object the aa and the Akrapovic systems are looking good on numbers. if money has to be budgeted the rpi system has to be on the top of the list.
__________________
Naveen


WANTED:
Audi S4<Audi S5<BMW M3 sedan<Audi RS5
naveenb is offline   United_States
0
Reply With Quote
      04-17-2009, 04:03 PM   #13
dogears
My master volume goes to 11
 
dogears's Avatar
 
Drives: 2009 Space Gray M3 Sedan M-DCT
Join Date: Dec 2008
Location: Cherry Hill, NJ

Posts: 424
iTrader: (0)

So you move the O2 past those rear cats?? And the 100 cell doesn't code?

Quote:
Originally Posted by Checkcaptain View Post
Negative - it comes with Lambda adaptors!
__________________
2009 Space Gray Carbon Leather E90 with DCT, Tech package, and EPS. Mods: Fabspeed 200 cell cats, Xpipe w/resonators and no secondary cats, BPM tune, Euro DCT software, Eisenmann Sport Mufflers, Vorsteiner Rear Diffuser II, SWS8 subs, JL Audio XD400 bridged 2X200W, built in radar
dogears is offline  
0
Reply With Quote
      04-17-2009, 04:37 PM   #14
dmerk1978
First Lieutenant
 
dmerk1978's Avatar
 
Drives: e 90 m3 sedan aw
Join Date: Dec 2008
Location: long beach, ca

Posts: 315
iTrader: (0)

Garage List
2009 red bad ass wagon  [0.00]
2008 E90  [0.00]
2007 Denali  [0.00]
2006 550i  [0.00]
2004 clk 500  [0.00]
Quote:
Originally Posted by naveenb View Post
if money is no object the aa and the Akrapovic systems are looking good on numbers. if money has to be budgeted the rpi system has to be on the top of the list.

the Akrapovic quotes 24hp, and the rpi quotes 28hp, so if the O.P. is looking for straight gains why wouldn't he go with the RPI system...am i missing something?
dmerk1978 is offline  
0
Reply With Quote
      04-17-2009, 05:35 PM   #15
d_dot
4 * General
 
d_dot's Avatar
 
Drives: F12 M6,Audi R8 Lambo Gallardo
Join Date: Dec 2007
Location: Tri-State

Posts: 645
iTrader: (0)

Send a message via AIM to d_dot
Quote:
Originally Posted by Checkcaptain View Post
Akrapovic TI evolution system!
damn thats a sexy exhaust. sorry bout asking for the hp numbers i was at work earlier and the pics most of the time dont show up. i see i asked for the numbers like an idiot. but thx now where can i get one of them and if its 24hp do u kjnow how much it would be with no cats?
__________________
Nissan GT-R (Sold) E92 M3 + 335 (sold) F10 535 (sold) When Driving Nice Whips It Helps To Have Nice Kix!
d_dot is offline   United_States
0
Reply With Quote
      04-17-2009, 06:08 PM   #16
d_dot
4 * General
 
d_dot's Avatar
 
Drives: F12 M6,Audi R8 Lambo Gallardo
Join Date: Dec 2007
Location: Tri-State

Posts: 645
iTrader: (0)

Send a message via AIM to d_dot
another quick question if i get a cat delete x pipe from fab speed will it hook up directly to rpi cat back just curious since they are fairly local?
__________________
Nissan GT-R (Sold) E92 M3 + 335 (sold) F10 535 (sold) When Driving Nice Whips It Helps To Have Nice Kix!
d_dot is offline   United_States
0
Reply With Quote
      04-17-2009, 07:04 PM   #17
dogears
My master volume goes to 11
 
dogears's Avatar
 
Drives: 2009 Space Gray M3 Sedan M-DCT
Join Date: Dec 2008
Location: Cherry Hill, NJ

Posts: 424
iTrader: (0)

Because a difference of 4hp measured on different dynos and different cars is insignificant. Plus the Akrapovic has cats and resonators. The RPI doesn't. Therefore, if we are to split hairs, the Akrapovic is clearly superior.

I stand by the comment that any well designed exhaust will net about the same gains. It is not rocket science.

Quote:
Originally Posted by dmerk1978 View Post
the Akrapovic quotes 24hp, and the rpi quotes 28hp, so if the O.P. is looking for straight gains why wouldn't he go with the RPI system...am i missing something?
__________________
2009 Space Gray Carbon Leather E90 with DCT, Tech package, and EPS. Mods: Fabspeed 200 cell cats, Xpipe w/resonators and no secondary cats, BPM tune, Euro DCT software, Eisenmann Sport Mufflers, Vorsteiner Rear Diffuser II, SWS8 subs, JL Audio XD400 bridged 2X200W, built in radar
dogears is offline  
0
Reply With Quote
      04-17-2009, 08:06 PM   #18
J08M3
Major General
 
J08M3's Avatar
 
Drives: 2011 M3 COUPE
Join Date: May 2008
Location: NEW YORK

Posts: 6,012
iTrader: (8)

Quote:
Originally Posted by dogears View Post

I stand by the comment that any well designed exhaust will net about the same gains. It is not rocket science.
+1.. My feeling is the biggest changes in dyno numbers have to do with the person conducting the dyno runs.

Any properly designed system will have very little restriction and all offer about the same HP gain. The real trick is doing that plus coming up with a nice sound and no drone at the same time.
__________________
J08M3 is offline   United_States
0
Reply With Quote
      04-18-2009, 12:48 AM   #19
Sal@Evolve
BimmerPost Supporting Vendor

 
Drives: Slow
Join Date: Feb 2008
Location: Luton, Bedfordshire

Posts: 1,063
iTrader: (0)

The Akrapovic dyno graph looks 100% legit. All correction factors, run down losses etc are very consistent and it's a realistic gain.

Same goes with the Active Autowerke system, very realistic figures and again top quality.

As a package the Active Autowerke system in unbeatable with it's excellent and thoroughly tested software.
Sal@Evolve is offline  
0
Reply With Quote
      04-18-2009, 07:52 AM   #20
mikewads
Lieutenant
 
mikewads's Avatar
 
Drives: 2009 M3 Coupe DCT
Join Date: Jan 2009
Location: Georgia

Posts: 470
iTrader: (3)

The Akrapovic system is also made out of titanium which means its much lighter.

Quote:
Originally Posted by dogears View Post
Because a difference of 4hp measured on different dynos and different cars is insignificant. Plus the Akrapovic has cats and resonators. The RPI doesn't. Therefore, if we are to split hairs, the Akrapovic is clearly superior.

I stand by the comment that any well designed exhaust will net about the same gains. It is not rocket science.
Quote:
Originally Posted by dmerk1978 View Post
the Akrapovic quotes 24hp, and the rpi quotes 28hp, so if the O.P. is looking for straight gains why wouldn't he go with the RPI system...am i missing something?
mikewads is offline  
0
Reply With Quote
      04-18-2009, 10:04 AM   #21
Akara1
Private
 
Akara1's Avatar
 
Drives: 2008 M3
Join Date: Sep 2008
Location: Los Angeles, CA

Posts: 53
iTrader: (0)

Quote:
Originally Posted by mikewads View Post
The Akrapovic system is also made out of titanium which means its much lighter.
Mine should be here tuesday.
Akara1 is offline  
0
Reply With Quote
      04-18-2009, 12:35 PM   #22
d_dot
4 * General
 
d_dot's Avatar
 
Drives: F12 M6,Audi R8 Lambo Gallardo
Join Date: Dec 2007
Location: Tri-State

Posts: 645
iTrader: (0)

Send a message via AIM to d_dot
Quote:
Originally Posted by mikewads View Post
The Akrapovic system is also made out of titanium which means its much lighter.
is that the main difference between stainless steel and titanium the weight savings? or can one provide more hp gains some how?
__________________
Nissan GT-R (Sold) E92 M3 + 335 (sold) F10 535 (sold) When Driving Nice Whips It Helps To Have Nice Kix!
d_dot is offline   United_States
0
Reply With Quote
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 05:05 PM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST